diff --git a/beacon-chain/rpc/beacon/BUILD.bazel b/beacon-chain/rpc/beacon/BUILD.bazel
index 72b8020e3b..1ef50ab49c 100644
--- a/beacon-chain/rpc/beacon/BUILD.bazel
+++ b/beacon-chain/rpc/beacon/BUILD.bazel
@@ -31,12 +31,14 @@ go_library(
         "//beacon-chain/flags:go_default_library",
         "//beacon-chain/operations/attestations:go_default_library",
         "//beacon-chain/operations/slashings:go_default_library",
+        "//beacon-chain/p2p:go_default_library",
         "//beacon-chain/powchain:go_default_library",
         "//beacon-chain/state:go_default_library",
         "//proto/beacon/p2p/v1:go_default_library",
         "//shared/attestationutil:go_default_library",
         "//shared/bytesutil:go_default_library",
         "//shared/event:go_default_library",
+        "//shared/featureconfig:go_default_library",
         "//shared/hashutil:go_default_library",
         "//shared/pagination:go_default_library",
         "//shared/params:go_default_library",
@@ -81,10 +83,12 @@ go_test(
         "//beacon-chain/flags:go_default_library",
         "//beacon-chain/operations/attestations:go_default_library",
         "//beacon-chain/operations/slashings:go_default_library",
+        "//beacon-chain/p2p/testing:go_default_library",
         "//beacon-chain/rpc/testing:go_default_library",
         "//beacon-chain/state:go_default_library",
         "//proto/beacon/p2p/v1:go_default_library",
         "//shared/attestationutil:go_default_library",
+        "//shared/featureconfig:go_default_library",
         "//shared/params:go_default_library",
         "//shared/testutil:go_default_library",
         "@com_github_gogo_protobuf//proto:go_default_library",
diff --git a/beacon-chain/rpc/beacon/server.go b/beacon-chain/rpc/beacon/server.go
index d83595165e..484ac6c827 100644
--- a/beacon-chain/rpc/beacon/server.go
+++ b/beacon-chain/rpc/beacon/server.go
@@ -13,6 +13,7 @@ import (
 	"github.com/prysmaticlabs/prysm/beacon-chain/db"
 	"github.com/prysmaticlabs/prysm/beacon-chain/operations/attestations"
 	"github.com/prysmaticlabs/prysm/beacon-chain/operations/slashings"
+	"github.com/prysmaticlabs/prysm/beacon-chain/p2p"
 	"github.com/prysmaticlabs/prysm/beacon-chain/powchain"
 	pbp2p "github.com/prysmaticlabs/prysm/proto/beacon/p2p/v1"
 )
@@ -33,6 +34,7 @@ type Server struct {
 	StateNotifier               statefeed.Notifier
 	BlockNotifier               blockfeed.Notifier
 	AttestationNotifier         operation.Notifier
+	Broadcaster                 p2p.Broadcaster
 	AttestationsPool            attestations.Pool
 	SlashingsPool               *slashings.Pool
 	CanonicalStateChan          chan *pbp2p.BeaconState
diff --git a/beacon-chain/rpc/beacon/slashings.go b/beacon-chain/rpc/beacon/slashings.go
index 50a9ba93b8..f8534acc16 100644
--- a/beacon-chain/rpc/beacon/slashings.go
+++ b/beacon-chain/rpc/beacon/slashings.go
@@ -4,6 +4,7 @@ import (
 	"context"
 
 	ethpb "github.com/prysmaticlabs/ethereumapis/eth/v1alpha1"
+	"github.com/prysmaticlabs/prysm/shared/featureconfig"
 	"github.com/prysmaticlabs/prysm/shared/sliceutil"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
@@ -23,6 +24,9 @@ func (bs *Server) SubmitProposerSlashing(
 	if err := bs.SlashingsPool.InsertProposerSlashing(ctx, beaconState, req); err != nil {
 		return nil, status.Errorf(codes.Internal, "Could not insert proposer slashing into pool: %v", err)
 	}
+	if featureconfig.Get().BroadcastSlashings {
+		bs.Broadcaster.Broadcast(ctx, req)
+	}
 	return &ethpb.SubmitSlashingResponse{
 		SlashedIndices: []uint64{req.ProposerIndex},
 	}, nil
@@ -42,6 +46,9 @@ func (bs *Server) SubmitAttesterSlashing(
 	if err := bs.SlashingsPool.InsertAttesterSlashing(ctx, beaconState, req); err != nil {
 		return nil, status.Errorf(codes.Internal, "Could not insert attester slashing into pool: %v", err)
 	}
+	if featureconfig.Get().BroadcastSlashings {
+		bs.Broadcaster.Broadcast(ctx, req)
+	}
 	slashedIndices := sliceutil.IntersectionUint64(req.Attestation_1.AttestingIndices, req.Attestation_2.AttestingIndices)
 	return &ethpb.SubmitSlashingResponse{
 		SlashedIndices: slashedIndices,
diff --git a/beacon-chain/rpc/beacon/slashings_test.go b/beacon-chain/rpc/beacon/slashings_test.go
index 08fff1fcdd..87dc11bc47 100644
--- a/beacon-chain/rpc/beacon/slashings_test.go
+++ b/beacon-chain/rpc/beacon/slashings_test.go
@@ -8,6 +8,8 @@ import (
 	ethpb "github.com/prysmaticlabs/ethereumapis/eth/v1alpha1"
 	mock "github.com/prysmaticlabs/prysm/beacon-chain/blockchain/testing"
 	"github.com/prysmaticlabs/prysm/beacon-chain/operations/slashings"
+	mockp2p "github.com/prysmaticlabs/prysm/beacon-chain/p2p/testing"
+	"github.com/prysmaticlabs/prysm/shared/featureconfig"
 	"github.com/prysmaticlabs/prysm/shared/testutil"
 )
 
@@ -24,11 +26,13 @@ func TestServer_SubmitProposerSlashing(t *testing.T) {
 		t.Fatal(err)
 	}
 
+	mb := &mockp2p.MockBroadcaster{}
 	bs := &Server{
 		HeadFetcher: &mock.ChainService{
 			State: st,
 		},
 		SlashingsPool: slashings.NewPool(),
+		Broadcaster:   mb,
 	}
 
 	// We want a proposer slashing for validator with index 2 to
@@ -49,6 +53,10 @@ func TestServer_SubmitProposerSlashing(t *testing.T) {
 		t.Errorf("Wanted %v, received %v", wanted, res)
 	}
 
+	if mb.BroadcastCalled {
+		t.Errorf("Expected broadcast not to be called by default")
+	}
+
 	slashing, err = testutil.GenerateProposerSlashingForValidator(st, privs[5], uint64(5))
 	if err != nil {
 		t.Fatal(err)
@@ -61,6 +69,53 @@ func TestServer_SubmitProposerSlashing(t *testing.T) {
 	}
 }
 
+func TestServer_SubmitProposerSlashingBroadcast(t *testing.T) {
+	ctx := context.Background()
+	cfg := featureconfig.Get()
+	cfg.BroadcastSlashings = true
+	featureconfig.Init(cfg)
+	defer func() {
+		cfg.BroadcastSlashings = false
+		featureconfig.Init(cfg)
+	}()
+
+	st, privs := testutil.DeterministicGenesisState(t, 64)
+	slashedVal, err := st.ValidatorAtIndex(5)
+	if err != nil {
+		t.Fatal(err)
+	}
+	// We mark the validator at index 5 as already slashed.
+	slashedVal.Slashed = true
+	if err := st.UpdateValidatorAtIndex(5, slashedVal); err != nil {
+		t.Fatal(err)
+	}
+
+	mb := &mockp2p.MockBroadcaster{}
+	bs := &Server{
+		HeadFetcher: &mock.ChainService{
+			State: st,
+		},
+		SlashingsPool: slashings.NewPool(),
+		Broadcaster:   mb,
+	}
+
+	// We want a proposer slashing for validator with index 2 to
+	// be included in the pool.
+	slashing, err := testutil.GenerateProposerSlashingForValidator(st, privs[2], uint64(2))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	_, err = bs.SubmitProposerSlashing(ctx, slashing)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if !mb.BroadcastCalled {
+		t.Errorf("Expected broadcast to be called")
+	}
+}
+
 func TestServer_SubmitAttesterSlashing(t *testing.T) {
 	ctx := context.Background()
 	// We mark the validators at index 5, 6 as already slashed.
@@ -76,11 +131,13 @@ func TestServer_SubmitAttesterSlashing(t *testing.T) {
 		t.Fatal(err)
 	}
 
+	mb := &mockp2p.MockBroadcaster{}
 	bs := &Server{
 		HeadFetcher: &mock.ChainService{
 			State: st,
 		},
 		SlashingsPool: slashings.NewPool(),
+		Broadcaster:   mb,
 	}
 
 	slashing, err := testutil.GenerateAttesterSlashingForValidator(st, privs[2], uint64(2))
@@ -101,6 +158,9 @@ func TestServer_SubmitAttesterSlashing(t *testing.T) {
 	if !proto.Equal(wanted, res) {
 		t.Errorf("Wanted %v, received %v", wanted, res)
 	}
+	if mb.BroadcastCalled {
+		t.Errorf("Expected broadcast not to be called by default")
+	}
 
 	slashing, err = testutil.GenerateAttesterSlashingForValidator(st, privs[5], uint64(5))
 	if err != nil {
@@ -112,3 +172,51 @@ func TestServer_SubmitAttesterSlashing(t *testing.T) {
 		t.Error("Expected including a attester slashing for an already slashed validator to fail")
 	}
 }
+
+func TestServer_SubmitAttesterSlashingBroadcast(t *testing.T) {
+	ctx := context.Background()
+	cfg := featureconfig.Get()
+	cfg.BroadcastSlashings = true
+	featureconfig.Init(cfg)
+	defer func() {
+		cfg.BroadcastSlashings = false
+		featureconfig.Init(cfg)
+	}()
+	// We mark the validators at index 5, 6 as already slashed.
+	st, privs := testutil.DeterministicGenesisState(t, 64)
+	slashedVal, err := st.ValidatorAtIndex(5)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// We mark the validator at index 5 as already slashed.
+	slashedVal.Slashed = true
+	if err := st.UpdateValidatorAtIndex(5, slashedVal); err != nil {
+		t.Fatal(err)
+	}
+
+	mb := &mockp2p.MockBroadcaster{}
+	bs := &Server{
+		HeadFetcher: &mock.ChainService{
+			State: st,
+		},
+		SlashingsPool: slashings.NewPool(),
+		Broadcaster:   mb,
+	}
+
+	slashing, err := testutil.GenerateAttesterSlashingForValidator(st, privs[2], uint64(2))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// We want the intersection of the slashing attesting indices
+	// to be slashed, so we expect validators 2 and 3 to be in the response
+	// slashed indices.
+	_, err = bs.SubmitAttesterSlashing(ctx, slashing)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !mb.BroadcastCalled {
+		t.Errorf("Expected broadcast to be called when flag is set")
+	}
+}
diff --git a/beacon-chain/rpc/service.go b/beacon-chain/rpc/service.go
index 7fa32062ab..116d1be415 100644
--- a/beacon-chain/rpc/service.go
+++ b/beacon-chain/rpc/service.go
@@ -257,6 +257,7 @@ func (s *Service) Start() {
 		StateNotifier:               s.stateNotifier,
 		BlockNotifier:               s.blockNotifier,
 		AttestationNotifier:         s.operationNotifier,
+		Broadcaster:                 s.p2p,
 		ReceivedAttestationsBuffer:  make(chan *ethpb.Attestation, 100),
 		CollectedAttestationsBuffer: make(chan []*ethpb.Attestation, 100),
 	}
diff --git a/shared/featureconfig/config.go b/shared/featureconfig/config.go
index a2fdf1fe7f..c0cf0c29bf 100644
--- a/shared/featureconfig/config.go
+++ b/shared/featureconfig/config.go
@@ -53,6 +53,9 @@ type Flags struct {
 	// as the chain head. UNSAFE, use with caution.
 	DisableForkChoice bool
 
+	// BroadcastSlashings enables p2p broadcasting of proposer or attester slashing.
+	BroadcastSlashings bool
+
 	// Cache toggles.
 	EnableSSZCache          bool // EnableSSZCache see https://github.com/prysmaticlabs/prysm/pull/4558.
 	EnableEth1DataVoteCache bool // EnableEth1DataVoteCache; see https://github.com/prysmaticlabs/prysm/issues/3106.
diff --git a/shared/featureconfig/flags.go b/shared/featureconfig/flags.go
index 9ccfdaca4a..90b084eedb 100644
--- a/shared/featureconfig/flags.go
+++ b/shared/featureconfig/flags.go
@@ -5,6 +5,10 @@ import (
 )
 
 var (
+	broadcastSlashingFlag = cli.BoolFlag{
+		Name:  "broadcast-slashing",
+		Usage: "Broadcast slashings from slashing pool.",
+	}
 	noCustomConfigFlag = cli.BoolFlag{
 		Name:  "no-custom-config",
 		Usage: "Run the beacon chain with the real parameters from phase 0.",
@@ -293,6 +297,7 @@ var BeaconChainFlags = append(deprecatedFlags, []cli.Flag{
 	checkHeadState,
 	enableNoiseHandshake,
 	dontPruneStateStartUp,
+	broadcastSlashingFlag,
 }...)
 
 // E2EBeaconChainFlags contains a list of the beacon chain feature flags to be tested in E2E.